Decay ofAg104and Levels inPd104

Abstract

The radioactive decay of the isomers of ${\mathrm{Ag}}^{104}$ has been investigated using scintillation spectrometers and a magnetic beta-ray spectrometer. Half-lives of (66±1) and (29.8±0.5) minutes were determined for the spin 5 and spin 2 isomers, respectively. Conversion electrons corresponding to 15 gamma rays assigned to ${\mathrm{Pd}}^{104}$ were observed. Two allowed positron transitions were detected: one of end-point energy (990±10) kev from the spin 5 isomer of ${\mathrm{Ag}}^{104}$; and the other of end-point energy (2705±15) kev from the spin 2 isomer. Gamma-gamma and beta-gamma coincidences were observed. The experimental data together with data obtained by other investigators is used to determine the spins and parities of the low-lying excited states of ${\mathrm{Pd}}^{104}$.